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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN

Product Details

Key Features

Applications/Uses

Parametric specs for Battery Chargers
Charging VIN (V) (max) 6.5
Max. ICHG (A) 1
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 15
Charger (V) 4.2
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/8
Budgetary
Price (See Notes)
1.68
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Simplified Block Diagram

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Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 6.5
Max. ICHG (A) 1
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 15
Charger (V) 4.2
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/8
Budgetary
Price (See Notes)
1.68

Key Features

  • Stand-Alone Linear 1-Cell Li+ Battery Charger
  • No External FET, Reverse Blocking Diode, or Current-Sense Resistor Required
  • Programmable Fast-Charge Current (1A max)
  • Proprietary Die Temperature Regulation Control (+115°C)
  • +4.25V to +15V Input Voltage Range with Input OVP Above +7V
  • Charge-Current Monitor for Fuel Gauging
  • Low Dropout Voltage—300mV at 500mA
  • Input Power-Source Detection Output (Active-Low ACOK) and Charge-Enable Input (Active-Low EN or EN)
  • Soft-Start Limits Inrush Current
  • Charge-Status Output (Active-Low CHG) for LED or Microprocessor (µP) Interface
  • Tiny 2mm x 2mm 8-Pin TDFN Package, 0.8mm (max) Height

Applications/Uses

  • Cell Phones/Cordless Phones
  • Charging Cradles and Docks
  • Digital Still Cameras and MP3 Players
  • Smartphones and PDAs
  • USB Appliances

Description

The MAX8808X/MAX8808Y/MAX8808Z intelligent, stand-alone constant-current/constant-voltage (CCCV), thermally regulated linear chargers are designed for charging a single-cell lithium-ion (Li+) battery. The MAX8808X/MAX8808Y/MAX8808Z integrate the current-sense circuit, MOS pass element, and thermal-regulation circuitry, and eliminate the reverse-blocking Schottky diode to create the simplest and smallest charging solution for handheld equipment.

The MAX8808X functions as a stand-alone charger to control the charging sequence from the prequalification state through fast-charge, top-off charge, and fullcharge indication. The MAX8808Y and MAX8808Z eliminate the prequalification state to allow startup into a load without a battery. Proprietary thermal-regulation circuitry limits the die temperature when fast-charging or while exposed to high ambient temperatures, allowing maximum charging current without damaging the IC.

The MAX8808X/MAX8808Y/MAX8808Z achieve high flexibility by providing an adjustable fast-charge current with an external resistor. Other features include a battery charging-status indicator (active-low CHG), an active-low control input (EN) for the MAX8808X and MAX8808Z (active-high control input for the MAX8808Y), and an active-low input power-source detection output (active-low ACOK).

The MAX8808X/MAX8808Y/MAX8808Z accept a +4.25V to +15V supply, but disable charging when the input voltage exceeds +7V to protect against unqualified or faulty AC adapters. The MAX8808X/MAX8808Y/MAX8808Z operate over the extended temperature range (-40°C to +85°C) and are available in a compact 8-pin thermally enhanced 2mm x 2mm TDFN package with 0.8mm (max) height.

Simplified Block Diagram

MAX8808X, MAX8808Y, MAX8808Z: Typical Operating Circuit MAX8808X, MAX8808Y, MAX8808Z: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .